National security Military policy 103 Foreign relations 94 Defenses 53 Politics and government 53 Thesis 50 Dissertations, Academic 42 Terrorism 37 Strategic aspects 32 World politics 31 Congresses 30 Prevention 28 Security, International 25 Government policy 22 History 22 Armed Forces 19 Military relations 17 United States 16 Asia 13 Australia 13 Pacific Area 13 Decision making 12 Economic conditions 11 Strategy 11 Relations 10 Economic policy 9 Intelligence service 9 Sea-power 9 Air power 8 Foreign economic relations 8